<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt />
      </div>
      <!-- 表单区 -->
      <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 prop与js下面data关联验证-->
        <el-form-item prop="password">
          <el-input type="password" v-model="loginForm.password" prefix-icon="iconfont icon-password"></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //登录表单的数据绑定对象
      loginForm:{
        username:'admin',
        password:'123456'
      },
      //表单验证规则
      loginFormRules:{
        //校验username
        username:[
            { required: true, message: '请输入用户名', trigger: 'blur' },
            { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        //校验password
        password:[
           { required: true, message: '请输入登录密码', trigger: 'blur' },
            { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods:{
    resetLoginForm() {
      //console.log(this);指向表单loginFormRef
      //重置表单状态
      this.$refs.loginFormRef.resetFields();
    },
    login() {//val 布尔值，判断验证是否通过
      this.$refs.loginFormRef.validate(async val =>{
        //console.log(val);await 将数据变为异步输出 与async一起用
        if(!val){return}
       const { data: res } =await this.$http.post('login',this.loginForm)
      // console.log(res);
      if(res.meta.status !== 200)
       return this.$message.error('用户名密码不正确');
      this.$message.success('登录成功');

      //存储token令牌 保存用户的登录状态，防止跨域脚本攻击
      window.sessionStorage.setItem("token", res.data.token);
      this.$router.push('/home');
      });
    }
  }
};
</script>
 <!--scoped不写就是全局生效-->
   <style lang='less' scoped>
.login_container {
  background-color: turquoise;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 5px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    box-shadow: 0px 0px 10px gainsboro;
    border-radius: 50%;
    padding: 10px;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background: rgb(241, 231, 231);
    }
  }
}
.login_form{
  position: absolute;
  bottom: 0px;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns{
  display: flex;
  justify-content: center;
}
</style>